public EnumDefinition ParseEnumDefinition(TokenStream tokens)
{
Token enumToken = tokens.PopExpected("enum");
Token nameToken = EnsureTokenIsValidName(tokens.Pop(), "Invalid name for an enum.");
EnumDefinition enumDef = new EnumDefinition(enumToken, nameToken, this.context);
this.currentCodeOwner = enumDef;
List <Token> valueTokens = new List <Token>();
List <Expression> valueExpressions = new List <Expression>();
tokens.PopExpected("{");
bool first = true;
while (!tokens.PopIfPresent("}"))
{
if (!first)
{
tokens.PopExpected(",");
}
else
{
first = false;
}
if (tokens.PopIfPresent("}"))
{
break;
}
Token valueToken = EnsureTokenIsValidName(tokens.Pop(), "Invalid name for a enum value.");
valueTokens.Add(valueToken);
if (tokens.PopIfPresent("="))
{
Expression value = ParseExpression(tokens);
valueExpressions.Add(value);
}
else
{
valueExpressions.Add(null);
}
}
enumDef.InitializeValues(valueTokens, valueExpressions);
this.currentCodeOwner = null;
return(enumDef);
}